Toy building brick



FIG. 1 is a front top isometric view of a toy building brick showing my new design;

FIG. 2 is a bottom rear isometric view of the toy building brick;

FIG. 3 is a right side view of the toy building brick;

FIG. 4 is a left side view of the toy building brick;

FIG. 5 is a bottom view of the toy building brick; and,

FIG. 6 is a cross-sectional view of the toy building brick taken along line 6-6 of FIG. 3 to indicate depth of openings extending into the toy building brick. 

CLAIM The ornamental design for a toy building brick, as shown and described. 